tracing: consolidate code between trace_output.c and trace_function_graph.c

Both trace_output.c and trace_function_graph.c do basically the same
thing to handle the printing of the latency-format. This patch moves
the code into one function that both can use.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 24 insertions, 6 deletions

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 29a370a4558..f572f44c6e1 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -460,19 +460,23 @@ seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
 	return ret;
 }
 
-static int
-lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
+/**
+ * trace_print_lat_fmt - print the irq, preempt and lockdep fields
+ * @s: trace seq struct to write to
+ * @entry: The trace entry field from the ring buffer
+ *
+ * Prints the generic fields of irqs off, in hard or softirq, preempt
+ * count and lock depth.
+ */
+int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
 {
 	int hardirq, softirq;
-	char comm[TASK_COMM_LEN];
 	int ret;
 
-	trace_find_cmdline(entry->pid, comm);
 	hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
 	softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
 
-	if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c",
-			      comm, entry->pid, cpu,
+	if (!trace_seq_printf(s, "%c%c%c",
 			      (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
 				(entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
 				  'X' : '.',
@@ -494,6 +498,20 @@ lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
 	return trace_seq_putc(s, '.');
 }
 
+static int
+lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
+{
+	char comm[TASK_COMM_LEN];
+
+	trace_find_cmdline(entry->pid, comm);
+
+	if (!trace_seq_printf(s, "%8.8s-%-5d %3d",
+			      comm, entry->pid, cpu))
+		return 0;
+
+	return trace_print_lat_fmt(s, entry);
+}
+
 static unsigned long preempt_mark_thresh = 100;
 
 static int